Arduino and Atmel have jointly announced the latest addition to the Arduino family with Arduino Zero, a development board based on Atmel SAMD21 ARM Cortex M0+ MCU with the same form factor and headers as Arduino UNO / Leonardo.

That’s about all we know for now, as tools support (Arduino IDE?), availability and pricing have not been announced. If you are at the Maker Faire Bay Area 2014 in San Mateo on May 17 and 18, you’ll be able to check out the board at Arduino (#204), Atmel (#205), and/or ARM (#405) booths.